基于电加热催化器耦合柴油机后处理系统的排放特性研究  

Study on Emission Characteristics of Diesel Engine Post-treatment System Based on Electric Heating Catalytic Converter

作　　者：王彬[1,2] 汪伟峰[2] Wang Bin;Wang Wei-feng(Tongji University,Shanghai 201804,China;Jiangling Motors Corporation,Ltd,Nanchang 330000,China)

机构地区：[1]同济大学,上海201804 [2]江铃汽车股份有限公司,江西南昌330000

出　　处：《内燃机与配件》2022年第22期21-23,共3页Internal Combustion Engine & Parts

摘　　要：本文基于全球轻型汽车测试循环(WLTC)和实际行驶工况(RDE)研究了EHC耦合尾气后处理系统(DOC+SDPF+SCR+ASC)对轻型柴油车排放特性的影响。研究结果表明:WLTC工况下,开启EHC,DOC出口温度达到180℃的时间提前了44s,柴油车的CO、THC、NO_(X)排放均满足国六b限值要求,其中NOx总体转化效率较无EHC时提升7.05%,燃油消耗增加了2.30%。RDE工况下,开启EHC,城市工况阶段的NOx排放降幅达93.90%,RDE全程的NOx排放降幅达88.30%,远低于国六b+RDE排放法规要求。Based on the global light Vehicle Test Cycle(WLTC)and actual driving conditions(RDE),this paper investigated the effect of EHC coupled exhaust after-treatment system(DOC+SDPF+SCR+ASC)on the emission characteristics of light diesel vehicles.The results showed that under the WLTC condition,when EHC was turned on,the DOC outlet temperature reached 180℃44s earlier,and the CO,THC,and NOX emissions of diesel vehicle all meeted the limit of National VI b.The overall NOx conversion efficiency was increased by 7.05%and fuel consumption was increased by 2.30%compared with that without EHC.Under the RDE working condition,when EHC was turned on,the NOx emission in the urban working condition stage was reduced by 93.90%,and the NOx emission in the whole RDE process was reduced by 88.30%,which was far lower than the requirements of National VI b+RDE emission regulations.

关 键 词：电加热催化器 WLTC工况 RDE 排放特性 

分 类 号：TK42[动力工程及工程热物理—动力机械及工程]